package com.lsk.util;


import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

/**
 * 百度二维码解析
 */
public class BDQrParse {

    /**
     * 重要提示代码中所需工具类
     * FileUtil,Base64Util,HttpUtil,GsonUtils请从
     * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
     * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
     * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
     * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
     * 下载
     */
    public static String QRCode(String filePath) {

        String QrNumber=null;

        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/qrcode";
        try {
            // 本地文件路径
            //filePath = "D:\\Documents\\WeChat Files\\zzdykjCTO\\FileStorage\\File\\2020-03\\图片识别\\fl005385.jpg";
            byte[] imgData = FileUtil.readFileByBytes(filePath);
            String imgStr = Base64Util.encode(imgData);
            String imgParam = URLEncoder.encode(imgStr, "UTF-8");

            String param = "image=" + imgParam;

            // 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
            String accessToken =getAuth();

            String result = HttpUtil.post(url, accessToken, param);

            Map<String,Object> resultMap= JsonUtil.getMapFromJsonObjStr(result);


           List<Object> resultList= JsonUtil.getListFromJsonArrStr(resultMap.get("codes_result").toString()) ;


           Map<String,Object> temp=JsonUtil.getMapFromJsonObjStr(resultList.get(0).toString());

            QrNumber=JsonUtil.getListFromJsonArrStr(temp.get("text").toString()).get(0).toString()  ;

            System.out.println(QrNumber);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }



    /**
     * 获取权限token
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public static String getAuth() {

        // 官网获取的 API Key 更新为你注册的
        String clientId = "0WYU1Tlg5bm3e0bPH9GGS8nH";
        // 官网获取的 Secret Key 更新为你注册的
        String clientSecret = "AtINGCeOQWgrl4795tTtb1lH0yg4vXIh";

        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + clientId
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + clientSecret;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            //System.err.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.getString("access_token");

            System.err.printf("获取到的token为："+access_token);
            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }

    /**
     * 数字识别
     * @param
     */
    public static String numbers(String filePath ) {
        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/numbers";
        try {
            // 本地文件路径
            //String filePath = "G:\\3.jpg";
            byte[] imgData = FileUtil.readFileByBytes(filePath);
            String imgStr = Base64Util.encode(imgData);
            String imgParam = URLEncoder.encode(imgStr, "UTF-8");

            String param = "image=" + imgParam;

            // 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
            String accessToken = getAuth();

            String result = HttpUtil.post(url, accessToken, param);
            //System.out.println(result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }





    public static void main(String[] args) {
        //QRCode("");
        //numbers();
        //getAuth();
    }
}
